package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.google.gson.JsonObject;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;


import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.utils.HttpClientUtil;
import io.swagger.v3.core.util.Json;
import org.apache.http.client.HttpClient;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.apache.http.impl.client.HttpClients;

import java.io.StringReader;
import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;


@Service
public class UserServiceImpl implements com.sky.service.UserService {

    //微信登录接口地址
    private static final String WX_LOGIN_URL = "https://api.weixin.qq.com/sns/jscode2session";

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    /*
     * 微信登录
     * */
    public User Login(UserLoginDTO userLoginDTO) {

        //调用微信服务解口获取openId
        String openid = getOpenId(userLoginDTO.getCode());

        //判断openId是否为空为空则抛出业务异常
        if (openid == null) {
            throw new RuntimeException("微信登录失败");
        }
        //如果是新用户，自动完成注册

        User user = userMapper.getByOpenId(openid);
        if (user == null) {
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }


        //返回这个用户对象
        return user;
    }

    /*
     * 根据临时登陆吗获取openId
     * */
    private String getOpenId(String code) {
        Map<String, String> map = new HashMap<>();
        map.put("appid", weChatProperties.getAppid());
        map.put("secret", weChatProperties.getSecret());
        map.put("js_code", code);
        map.put("grant_type", "authorization_code");

        //访问微信服务接口
        String json = HttpClientUtil.doGet(WX_LOGIN_URL, map);//返回来的是一个json数据

        //把json数据转为JsonObject对象
        JSONObject jsonObject = JSON.parseObject(json);
        String openid = jsonObject.getString("openid");
        return openid;

    }

}
